Abstract
The influences of titanium (Ti) doping on the gas retention capacity and photo-induced outgassing behavior of hollow glass microspheres (HGMs) were investigated. It was found that the addition of Ti4+ did not significantly impact the permeability of HGMs, which exhibited a pressure half-life over 100 days. The Kp of Ti3+-doped HGMs was found to be 3–8 times higher than that of Ti4+-doped HGMs, where oxygen vacancies and phase interfaces in the glass shell act as gas diffusion passages. Fortunately, these defects can be eliminated by heat treatment at 600 °C to improve the gas retention capacity. Moreover, photo-induced outgassing was observed in Ti3+-doped HGMs due to the absorption of light in the range of 400–2400 nm, while no absorption or response to illumination was observed in Ti4+-doped HGMs. Notably, the photo-induced outgassing was found to be controllable and repeatable without attenuation of response rate or intensity over four trials.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
